Do certain dogs have a NATURAL INCLINATION to be very good at something? Like hunting dogs/sheep dogs/dogs who serve as eyes for the blind?

They do need training to be guide, sniffer, hunting or sheep dogs. They have been bred to serve humans but their innate talents need to be honed. Their keen sense of smell needs to be trained to sniff out a particular scent rather than anything the dog finds interesting. A dog will naturally chase and retrieve game, or sheep, but needs training to not eat the game and to make the sheep go where the farmer wants them to go rather than fleeing randomly. Guide dog training is much more rigorous and half the candidates fail.
It's long been known that a dog's aural range reaches into ultrasonic, just how this was discovered is anybody's guess. Bats can hear twice the frequency a dog can. Both species tend to rely less on sight than humans do. A dog's colour perception is limited (they are not completely colour blind but there are some colours that they don't distinguish), bats are blind in daylight (permanently dilated pupils - they can see at night although not particularly well).